Speed up query "select xx,xx from xxx LIMIT xxx" if no filtering or aggregation -------------------------------------------------------------------------------
Key: HIVE-2068 URL: https://issues.apache.org/jira/browse/HIVE-2068 Project: Hive Issue Type: Improvement Reporter: Siying Dong Assignee: Siying Dong Currently, "select xx,xx from xxx where ...(only partition conditions) LIMIT xxx" will start a MapReduce job with input to be the whole table or partition. The latency can be huge if the table or partition is big. We could reduce number of input files to speed up the queries. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira